HXCOMM Use DEFHEADING() to define headings in both help text and texi
HXCOMM Text between STEXI and ETEXI are copied to texi version and
HXCOMM discarded from C version
-HXCOMM DEF(option, HAS_ARG/0, opt_enum, opt_help) is used to construct
-HXCOMM option structures, enums and help message.
+HXCOMM DEF(option, HAS_ARG/0, opt_enum, opt_help, arch_mask) is used to
+HXCOMM construct option structures, enums and help message for specified
+HXCOMM architectures.
HXCOMM HXCOMM can be used for comments, discarded from both texi and C
DEFHEADING(Standard options:)
ETEXI
DEF("help", 0, QEMU_OPTION_h,
- "-h or -help display this help and exit\n")
+ "-h or -help display this help and exit\n", QEMU_ARCH_ALL)
STEXI
@item -h
+@findex -h
Display help and exit
ETEXI
DEF("version", 0, QEMU_OPTION_version,
- "-version display version information and exit\n")
+ "-version display version information and exit\n", QEMU_ARCH_ALL)
STEXI
@item -version
+@findex -version
Display version information and exit
ETEXI
DEF("M", HAS_ARG, QEMU_OPTION_M,
- "-M machine select emulated machine (-M ? for list)\n")
+ "-M machine select emulated machine (-M ? for list)\n", QEMU_ARCH_ALL)
STEXI
@item -M @var{machine}
+@findex -M
Select the emulated @var{machine} (@code{-M ?} for list)
ETEXI
DEF("cpu", HAS_ARG, QEMU_OPTION_cpu,
- "-cpu cpu select CPU (-cpu ? for list)\n")
+ "-cpu cpu select CPU (-cpu ? for list)\n", QEMU_ARCH_ALL)
STEXI
@item -cpu @var{model}
+@findex -cpu
Select CPU model (-cpu ? for list and additional feature selection)
ETEXI
DEF("smp", HAS_ARG, QEMU_OPTION_smp,
- "-smp n set the number of CPUs to 'n' [default=1]\n")
-STEXI
-@item -smp @var{n}
+ "-smp n[,maxcpus=cpus][,cores=cores][,threads=threads][,sockets=sockets]\n"
+ " set the number of CPUs to 'n' [default=1]\n"
+ " maxcpus= maximum number of total cpus, including\n"
+ " offline CPUs for hotplug, etc\n"
+ " cores= number of CPU cores on one socket\n"
+ " threads= number of threads on one CPU core\n"
+ " sockets= number of discrete sockets in the system\n",
+ QEMU_ARCH_ALL)
+STEXI
+@item -smp @var{n}[,cores=@var{cores}][,threads=@var{threads}][,sockets=@var{sockets}][,maxcpus=@var{maxcpus}]
+@findex -smp
Simulate an SMP system with @var{n} CPUs. On the PC target, up to 255
CPUs are supported. On Sparc32 target, Linux limits the number of usable CPUs
to 4.
+For the PC target, the number of @var{cores} per socket, the number
+of @var{threads} per cores and the total number of @var{sockets} can be
+specified. Missing values will be computed. If any on the three values is
+given, the total number of CPUs @var{n} can be omitted. @var{maxcpus}
+specifies the maximum number of hotpluggable CPUs.
ETEXI
DEF("numa", HAS_ARG, QEMU_OPTION_numa,
- "-numa node[,mem=size][,cpus=cpu[-cpu]][,nodeid=node]\n")
+ "-numa node[,mem=size][,cpus=cpu[-cpu]][,nodeid=node]\n", QEMU_ARCH_ALL)
STEXI
@item -numa @var{opts}
+@findex -numa
Simulate a multi node NUMA system. If mem and cpus are omitted, resources
are split equally.
ETEXI
DEF("fda", HAS_ARG, QEMU_OPTION_fda,
- "-fda/-fdb file use 'file' as floppy disk 0/1 image\n")
-DEF("fdb", HAS_ARG, QEMU_OPTION_fdb, "")
+ "-fda/-fdb file use 'file' as floppy disk 0/1 image\n", QEMU_ARCH_ALL)
+DEF("fdb", HAS_ARG, QEMU_OPTION_fdb, "", QEMU_ARCH_ALL)
STEXI
@item -fda @var{file}
@item -fdb @var{file}
+@findex -fda
+@findex -fdb
Use @var{file} as floppy disk 0/1 image (@pxref{disk_images}). You can
use the host floppy by using @file{/dev/fd0} as filename (@pxref{host_drives}).
ETEXI
DEF("hda", HAS_ARG, QEMU_OPTION_hda,
- "-hda/-hdb file use 'file' as IDE hard disk 0/1 image\n")
-DEF("hdb", HAS_ARG, QEMU_OPTION_hdb, "")
+ "-hda/-hdb file use 'file' as IDE hard disk 0/1 image\n", QEMU_ARCH_ALL)
+DEF("hdb", HAS_ARG, QEMU_OPTION_hdb, "", QEMU_ARCH_ALL)
DEF("hdc", HAS_ARG, QEMU_OPTION_hdc,
- "-hdc/-hdd file use 'file' as IDE hard disk 2/3 image\n")
-DEF("hdd", HAS_ARG, QEMU_OPTION_hdd, "")
+ "-hdc/-hdd file use 'file' as IDE hard disk 2/3 image\n", QEMU_ARCH_ALL)
+DEF("hdd", HAS_ARG, QEMU_OPTION_hdd, "", QEMU_ARCH_ALL)
STEXI
@item -hda @var{file}
@item -hdb @var{file}
@item -hdc @var{file}
@item -hdd @var{file}
+@findex -hda
+@findex -hdb
+@findex -hdc
+@findex -hdd
Use @var{file} as hard disk 0, 1, 2 or 3 image (@pxref{disk_images}).
ETEXI
DEF("cdrom", HAS_ARG, QEMU_OPTION_cdrom,
- "-cdrom file use 'file' as IDE cdrom image (cdrom is ide1 master)\n")
+ "-cdrom file use 'file' as IDE cdrom image (cdrom is ide1 master)\n",
+ QEMU_ARCH_ALL)
STEXI
@item -cdrom @var{file}
+@findex -cdrom
Use @var{file} as CD-ROM image (you cannot use @option{-hdc} and
@option{-cdrom} at the same time). You can use the host CD-ROM by
using @file{/dev/cdrom} as filename (@pxref{host_drives}).
DEF("drive", HAS_ARG, QEMU_OPTION_drive,
"-drive [file=file][,if=type][,bus=n][,unit=m][,media=d][,index=i]\n"
" [,cyls=c,heads=h,secs=s[,trans=t]][,snapshot=on|off]\n"
- " [,cache=writethrough|writeback|none][,format=f][,serial=s]\n"
- " [,addr=A]\n"
- " use 'file' as a drive image\n")
+ " [,cache=writethrough|writeback|unsafe|none][,format=f]\n"
+ " [,serial=s][,addr=A][,id=name][,aio=threads|native]\n"
+ " [,readonly=on|off]\n"
+ " use 'file' as a drive image\n", QEMU_ARCH_ALL)
STEXI
@item -drive @var{option}[,@var{option}[,@var{option}[,...]]]
+@findex -drive
Define a new drive. Valid options are:
-@table @code
+@table @option
@item file=@var{file}
This option defines which disk image (@pxref{disk_images}) to use with
this drive. If the filename contains comma, you must double it
@item snapshot=@var{snapshot}
@var{snapshot} is "on" or "off" and allows to enable snapshot for given drive (see @option{-snapshot}).
@item cache=@var{cache}
-@var{cache} is "none", "writeback", or "writethrough" and controls how the host cache is used to access block data.
+@var{cache} is "none", "writeback", "unsafe", or "writethrough" and controls how the host cache is used to access block data.
+@item aio=@var{aio}
+@var{aio} is "threads", or "native" and selects between pthread based disk I/O and native Linux AIO.
@item format=@var{format}
Specify which disk @var{format} will be used rather than detecting
the format. Can be used to specifiy format=raw to avoid interpreting
Writeback caching will report data writes as completed as soon as the data is
present in the host page cache. This is safe as long as you trust your host.
If your host crashes or loses power, then the guest may experience data
-corruption. When using the @option{-snapshot} option, writeback caching is
-used by default.
+corruption.
The host page cache can be avoided entirely with @option{cache=none}. This will
attempt to do disk IO directly to the guests memory. QEMU may still perform
Some block drivers perform badly with @option{cache=writethrough}, most notably,
qcow2. If performance is more important than correctness,
-@option{cache=writeback} should be used with qcow2. By default, if no explicit
-caching is specified for a qcow2 disk image, @option{cache=writeback} will be
-used. For all other disk types, @option{cache=writethrough} is the default.
+@option{cache=writeback} should be used with qcow2.
+
+In case you don't care about data integrity over host failures, use
+cache=unsafe. This option tells qemu that it never needs to write any data
+to the disk but can instead keeps things in cache. If anything goes wrong,
+like your host losing power, the disk storage getting disconnected accidently,
+etc. you're image will most probably be rendered unusable. When using
+the @option{-snapshot} option, unsafe caching is always used.
Instead of @option{-cdrom} you can use:
@example
@end example
ETEXI
-DEF("mtdblock", HAS_ARG, QEMU_OPTION_mtdblock,
- "-mtdblock file use 'file' as on-board Flash memory image\n")
+DEF("set", HAS_ARG, QEMU_OPTION_set,
+ "-set group.id.arg=value\n"
+ " set <arg> parameter for item <id> of type <group>\n"
+ " i.e. -set drive.$id.file=/path/to/image\n", QEMU_ARCH_ALL)
+STEXI
+@item -set
+@findex -set
+TODO
+ETEXI
+
+DEF("global", HAS_ARG, QEMU_OPTION_global,
+ "-global driver.property=value\n"
+ " set a global default for a driver property\n",
+ QEMU_ARCH_ALL)
STEXI
+@item -global
+@findex -global
+TODO
+ETEXI
-@item -mtdblock file
-Use 'file' as on-board Flash memory image.
+DEF("mtdblock", HAS_ARG, QEMU_OPTION_mtdblock,
+ "-mtdblock file use 'file' as on-board Flash memory image\n",
+ QEMU_ARCH_ALL)
+STEXI
+@item -mtdblock @var{file}
+@findex -mtdblock
+Use @var{file} as on-board Flash memory image.
ETEXI
DEF("sd", HAS_ARG, QEMU_OPTION_sd,
- "-sd file use 'file' as SecureDigital card image\n")
+ "-sd file use 'file' as SecureDigital card image\n", QEMU_ARCH_ALL)
STEXI
-@item -sd file
-Use 'file' as SecureDigital card image.
+@item -sd @var{file}
+@findex -sd
+Use @var{file} as SecureDigital card image.
ETEXI
DEF("pflash", HAS_ARG, QEMU_OPTION_pflash,
- "-pflash file use 'file' as a parallel flash image\n")
+ "-pflash file use 'file' as a parallel flash image\n", QEMU_ARCH_ALL)
STEXI
-@item -pflash file
-Use 'file' as a parallel flash image.
+@item -pflash @var{file}
+@findex -pflash
+Use @var{file} as a parallel flash image.
ETEXI
DEF("boot", HAS_ARG, QEMU_OPTION_boot,
- "-boot [a|c|d|n] boot on floppy (a), hard disk (c), CD-ROM (d), or network (n)\n")
-STEXI
-@item -boot [a|c|d|n]
-Boot on floppy (a), hard disk (c), CD-ROM (d), or Etherboot (n). Hard disk boot
-is the default.
+ "-boot [order=drives][,once=drives][,menu=on|off]\n"
+ " 'drives': floppy (a), hard disk (c), CD-ROM (d), network (n)\n",
+ QEMU_ARCH_ALL)
+STEXI
+@item -boot [order=@var{drives}][,once=@var{drives}][,menu=on|off]
+@findex -boot
+Specify boot order @var{drives} as a string of drive letters. Valid
+drive letters depend on the target achitecture. The x86 PC uses: a, b
+(floppy 1 and 2), c (first hard disk), d (first CD-ROM), n-p (Etherboot
+from network adapter 1-4), hard disk boot is the default. To apply a
+particular boot order only on the first startup, specify it via
+@option{once}.
+
+Interactive boot menus/prompts can be enabled via @option{menu=on} as far
+as firmware/BIOS supports them. The default is non-interactive boot.
+
+@example
+# try to boot from network first, then from hard disk
+qemu -boot order=nc
+# boot from CD-ROM first, switch back to default order after reboot
+qemu -boot once=d
+@end example
+
+Note: The legacy format '-boot @var{drives}' is still supported but its
+use is discouraged as it may be removed from future versions.
ETEXI
DEF("snapshot", 0, QEMU_OPTION_snapshot,
- "-snapshot write to temporary files instead of disk image files\n")
+ "-snapshot write to temporary files instead of disk image files\n",
+ QEMU_ARCH_ALL)
STEXI
@item -snapshot
+@findex -snapshot
Write to temporary files instead of disk image files. In this case,
the raw disk image you use is not written back. You can however force
the write back by pressing @key{C-a s} (@pxref{disk_images}).
ETEXI
DEF("m", HAS_ARG, QEMU_OPTION_m,
- "-m megs set virtual RAM size to megs MB [default=%d]\n")
+ "-m megs set virtual RAM size to megs MB [default="
+ stringify(DEFAULT_RAM_SIZE) "]\n", QEMU_ARCH_ALL)
STEXI
@item -m @var{megs}
+@findex -m
Set virtual RAM size to @var{megs} megabytes. Default is 128 MiB. Optionally,
a suffix of ``M'' or ``G'' can be used to signify a value in megabytes or
gigabytes respectively.
ETEXI
+DEF("mem-path", HAS_ARG, QEMU_OPTION_mempath,
+ "-mem-path FILE provide backing storage for guest RAM\n", QEMU_ARCH_ALL)
+STEXI
+@item -mem-path @var{path}
+Allocate guest RAM from a temporarily created file in @var{path}.
+ETEXI
+
+#ifdef MAP_POPULATE
+DEF("mem-prealloc", 0, QEMU_OPTION_mem_prealloc,
+ "-mem-prealloc preallocate guest memory (use with -mem-path)\n",
+ QEMU_ARCH_ALL)
+STEXI
+@item -mem-prealloc
+Preallocate memory when using -mem-path.
+ETEXI
+#endif
+
DEF("k", HAS_ARG, QEMU_OPTION_k,
- "-k language use keyboard layout (for example 'fr' for French)\n")
+ "-k language use keyboard layout (for example 'fr' for French)\n",
+ QEMU_ARCH_ALL)
STEXI
@item -k @var{language}
-
+@findex -k
Use keyboard layout @var{language} (for example @code{fr} for
French). This option is only needed where it is not easy to get raw PC
keycodes (e.g. on Macs, with some X11 servers or with a VNC
ETEXI
-#ifdef HAS_AUDIO
DEF("audio-help", 0, QEMU_OPTION_audio_help,
- "-audio-help print list of audio drivers and their options\n")
-#endif
+ "-audio-help print list of audio drivers and their options\n",
+ QEMU_ARCH_ALL)
STEXI
@item -audio-help
-
+@findex -audio-help
Will show the audio subsystem help: list of drivers, tunable
parameters.
ETEXI
-#ifdef HAS_AUDIO
DEF("soundhw", HAS_ARG, QEMU_OPTION_soundhw,
"-soundhw c1,... enable audio support\n"
" and only specified sound cards (comma separated list)\n"
" use -soundhw ? to get the list of supported cards\n"
- " use -soundhw all to enable all of them\n")
-#endif
+ " use -soundhw all to enable all of them\n", QEMU_ARCH_ALL)
STEXI
@item -soundhw @var{card1}[,@var{card2},...] or -soundhw all
-
+@findex -soundhw
Enable audio and selected sound hardware. Use ? to print all
available sound hardware.
ETEXI
DEF("usb", 0, QEMU_OPTION_usb,
- "-usb enable the USB driver (will be the default soon)\n")
+ "-usb enable the USB driver (will be the default soon)\n",
+ QEMU_ARCH_ALL)
STEXI
USB options:
@table @option
@item -usb
+@findex -usb
Enable the USB driver (will be the default soon)
ETEXI
DEF("usbdevice", HAS_ARG, QEMU_OPTION_usbdevice,
- "-usbdevice name add the host or guest USB device 'name'\n")
+ "-usbdevice name add the host or guest USB device 'name'\n",
+ QEMU_ARCH_ALL)
STEXI
@item -usbdevice @var{devname}
+@findex -usbdevice
Add the USB device @var{devname}. @xref{usb_devices}.
-@table @code
+@table @option
@item mouse
Virtual Mouse. This will override the PS/2 mouse emulation when activated.
means qemu is able to report the mouse position without having to grab the
mouse. Also overrides the PS/2 mouse emulation when activated.
-@item disk:[format=@var{format}]:file
+@item disk:[format=@var{format}]:@var{file}
Mass storage device based on file. The optional @var{format} argument
will be used rather than detecting the format. Can be used to specifiy
-format=raw to avoid interpreting an untrusted format header.
+@code{format=raw} to avoid interpreting an untrusted format header.
-@item host:bus.addr
-Pass through the host device identified by bus.addr (Linux only).
+@item host:@var{bus}.@var{addr}
+Pass through the host device identified by @var{bus}.@var{addr} (Linux only).
-@item host:vendor_id:product_id
-Pass through the host device identified by vendor_id:product_id (Linux only).
+@item host:@var{vendor_id}:@var{product_id}
+Pass through the host device identified by @var{vendor_id}:@var{product_id}
+(Linux only).
@item serial:[vendorid=@var{vendor_id}][,productid=@var{product_id}]:@var{dev}
Serial converter to host character device @var{dev}, see @code{-serial} for the
Braille device. This will use BrlAPI to display the braille output on a real
or fake device.
-@item net:options
+@item net:@var{options}
Network adapter that supports CDC ethernet and RNDIS protocols.
@end table
ETEXI
+DEF("device", HAS_ARG, QEMU_OPTION_device,
+ "-device driver[,prop[=value][,...]]\n"
+ " add device (based on driver)\n"
+ " prop=value,... sets driver properties\n"
+ " use -device ? to print all possible drivers\n"
+ " use -device driver,? to print all possible properties\n",
+ QEMU_ARCH_ALL)
+STEXI
+@item -device @var{driver}[,@var{prop}[=@var{value}][,...]]
+@findex -device
+Add device @var{driver}. @var{prop}=@var{value} sets driver
+properties. Valid properties depend on the driver. To get help on
+possible drivers and properties, use @code{-device ?} and
+@code{-device @var{driver},?}.
+ETEXI
+
+#ifdef CONFIG_LINUX
+DEFHEADING(File system options:)
+
+DEF("fsdev", HAS_ARG, QEMU_OPTION_fsdev,
+ "-fsdev local,id=id,path=path,security_model=[mapped|passthrough]\n",
+ QEMU_ARCH_ALL)
+
+STEXI
+
+The general form of a File system device option is:
+@table @option
+
+@item -fsdev @var{fstype} ,id=@var{id} [,@var{options}]
+@findex -fsdev
+Fstype is one of:
+@option{local},
+The specific Fstype will determine the applicable options.
+
+Options to each backend are described below.
+
+@item -fsdev local ,id=@var{id} ,path=@var{path} ,security_model=@var{security_model}
+
+Create a file-system-"device" for local-filesystem.
+
+@option{local} is only available on Linux.
+
+@option{path} specifies the path to be exported. @option{path} is required.
+
+@option{security_model} specifies the security model to be followed.
+@option{security_model} is required.
+
+@end table
+ETEXI
+#endif
+
+#ifdef CONFIG_LINUX
+DEFHEADING(Virtual File system pass-through options:)
+
+DEF("virtfs", HAS_ARG, QEMU_OPTION_virtfs,
+ "-virtfs local,path=path,mount_tag=tag,security_model=[mapped|passthrough]\n",
+ QEMU_ARCH_ALL)
+
+STEXI
+
+The general form of a Virtual File system pass-through option is:
+@table @option
+
+@item -virtfs @var{fstype} [,@var{options}]
+@findex -virtfs
+Fstype is one of:
+@option{local},
+The specific Fstype will determine the applicable options.
+
+Options to each backend are described below.
+
+@item -virtfs local ,path=@var{path} ,mount_tag=@var{mount_tag} ,security_model=@var{security_model}
+
+Create a Virtual file-system-pass through for local-filesystem.
+
+@option{local} is only available on Linux.
+
+@option{path} specifies the path to be exported. @option{path} is required.
+
+@option{security_model} specifies the security model to be followed.
+@option{security_model} is required.
+
+
+@option{mount_tag} specifies the tag with which the exported file is mounted.
+@option{mount_tag} is required.
+
+@end table
+ETEXI
+#endif
+
+DEFHEADING()
+
DEF("name", HAS_ARG, QEMU_OPTION_name,
- "-name string set the name of the guest\n")
+ "-name string1[,process=string2]\n"
+ " set the name of the guest\n"
+ " string1 sets the window title and string2 the process name (on Linux)\n",
+ QEMU_ARCH_ALL)
STEXI
@item -name @var{name}
+@findex -name
Sets the @var{name} of the guest.
This name will be displayed in the SDL window caption.
The @var{name} will also be used for the VNC server.
+Also optionally set the top visible process name in Linux.
ETEXI
DEF("uuid", HAS_ARG, QEMU_OPTION_uuid,
- "-uuid %%08x-%%04x-%%04x-%%04x-%%012x\n"
- " specify machine UUID\n")
+ "-uuid %08x-%04x-%04x-%04x-%012x\n"
+ " specify machine UUID\n", QEMU_ARCH_ALL)
STEXI
@item -uuid @var{uuid}
+@findex -uuid
Set system UUID.
ETEXI
ETEXI
DEF("nographic", 0, QEMU_OPTION_nographic,
- "-nographic disable graphical output and redirect serial I/Os to console\n")
+ "-nographic disable graphical output and redirect serial I/Os to console\n",
+ QEMU_ARCH_ALL)
STEXI
@item -nographic
-
+@findex -nographic
Normally, QEMU uses SDL to display the VGA output. With this option,
you can totally disable graphical output so that QEMU is a simple
command line application. The emulated serial port is redirected on
#ifdef CONFIG_CURSES
DEF("curses", 0, QEMU_OPTION_curses,
- "-curses use a curses/ncurses interface instead of SDL\n")
+ "-curses use a curses/ncurses interface instead of SDL\n",
+ QEMU_ARCH_ALL)
#endif
STEXI
@item -curses
-
+@findex curses
Normally, QEMU uses SDL to display the VGA output. With this option,
QEMU can display the VGA output when in text mode using a
curses/ncurses interface. Nothing is displayed in graphical mode.
#ifdef CONFIG_SDL
DEF("no-frame", 0, QEMU_OPTION_no_frame,
- "-no-frame open SDL window without a frame and window decorations\n")
+ "-no-frame open SDL window without a frame and window decorations\n",
+ QEMU_ARCH_ALL)
#endif
STEXI
@item -no-frame
-
+@findex -no-frame
Do not use decorations for SDL windows and start them using the whole
available screen space. This makes the using QEMU in a dedicated desktop
workspace more convenient.
#ifdef CONFIG_SDL
DEF("alt-grab", 0, QEMU_OPTION_alt_grab,
- "-alt-grab use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt)\n")
+ "-alt-grab use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt)\n",
+ QEMU_ARCH_ALL)
#endif
STEXI
@item -alt-grab
-
+@findex -alt-grab
Use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt).
ETEXI
+#ifdef CONFIG_SDL
+DEF("ctrl-grab", 0, QEMU_OPTION_ctrl_grab,
+ "-ctrl-grab use Right-Ctrl to grab mouse (instead of Ctrl-Alt)\n",
+ QEMU_ARCH_ALL)
+#endif
+STEXI
+@item -ctrl-grab
+@findex -ctrl-grab
+Use Right-Ctrl to grab mouse (instead of Ctrl-Alt).
+ETEXI
+
#ifdef CONFIG_SDL
DEF("no-quit", 0, QEMU_OPTION_no_quit,
- "-no-quit disable SDL window close capability\n")
+ "-no-quit disable SDL window close capability\n", QEMU_ARCH_ALL)
#endif
STEXI
@item -no-quit
-
+@findex -no-quit
Disable SDL window close capability.
ETEXI
#ifdef CONFIG_SDL
DEF("sdl", 0, QEMU_OPTION_sdl,
- "-sdl enable SDL\n")
+ "-sdl enable SDL\n", QEMU_ARCH_ALL)
#endif
STEXI
@item -sdl
-
+@findex -sdl
Enable SDL.
ETEXI
DEF("portrait", 0, QEMU_OPTION_portrait,
- "-portrait rotate graphical output 90 deg left (only PXA LCD)\n")
+ "-portrait rotate graphical output 90 deg left (only PXA LCD)\n",
+ QEMU_ARCH_ALL)
STEXI
@item -portrait
-
+@findex -portrait
Rotate graphical output 90 deg left (only PXA LCD).
ETEXI
DEF("vga", HAS_ARG, QEMU_OPTION_vga,
"-vga [std|cirrus|vmware|xenfb|none]\n"
- " select video card type\n")
+ " select video card type\n", QEMU_ARCH_ALL)
STEXI
@item -vga @var{type}
+@findex -vga
Select type of VGA card to emulate. Valid values for @var{type} are
-@table @code
+@table @option
@item cirrus
Cirrus Logic GD5446 Video card. All Windows versions starting from
Windows 95 should recognize and use this graphic card. For optimal
ETEXI
DEF("full-screen", 0, QEMU_OPTION_full_screen,
- "-full-screen start in full screen\n")
+ "-full-screen start in full screen\n", QEMU_ARCH_ALL)
STEXI
@item -full-screen
+@findex -full-screen
Start in full screen.
ETEXI
-#if defined(TARGET_PPC) || defined(TARGET_SPARC)
DEF("g", 1, QEMU_OPTION_g ,
- "-g WxH[xDEPTH] Set the initial graphical resolution and depth\n")
-#endif
+ "-g WxH[xDEPTH] Set the initial graphical resolution and depth\n",
+ QEMU_ARCH_PPC | QEMU_ARCH_SPARC)
STEXI
+@item -g @var{width}x@var{height}[x@var{depth}]
+@findex -g
+Set the initial graphical resolution and depth (PPC, SPARC only).
ETEXI
DEF("vnc", HAS_ARG, QEMU_OPTION_vnc ,
- "-vnc display start a VNC server on display\n")
+ "-vnc display start a VNC server on display\n", QEMU_ARCH_ALL)
STEXI
@item -vnc @var{display}[,@var{option}[,@var{option}[,...]]]
-
+@findex -vnc
Normally, QEMU uses SDL to display the VGA output. With this option,
you can have QEMU listen on VNC display @var{display} and redirect the VGA
display over the VNC session. It is very useful to enable the usb
parameter to set the keyboard layout if you are not using en-us. Valid
syntax for the @var{display} is
-@table @code
+@table @option
@item @var{host}:@var{d}
By convention the TCP port is 5900+@var{d}. Optionally, @var{host} can
be omitted in which case the server will accept connections from any host.
-@item @code{unix}:@var{path}
+@item unix:@var{path}
Connections will be allowed over UNIX domain sockets where @var{path} is the
location of a unix socket to listen for connections on.
Following the @var{display} value there may be one or more @var{option} flags
separated by commas. Valid options are
-@table @code
+@table @option
@item reverse
Require that client use TLS when communicating with the VNC server. This
uses anonymous TLS credentials so is susceptible to a man-in-the-middle
attack. It is recommended that this option be combined with either the
-@var{x509} or @var{x509verify} options.
+@option{x509} or @option{x509verify} options.
@item x509=@var{/path/to/certificate/dir}
use the VNC server until the ACLs have been loaded. This can be
achieved using the @code{acl} monitor command.
+@item lossy
+
+Enable lossy compression methods (gradient, JPEG, ...). If this
+option is set, VNC client may receive lossy framebuffer updates
+depending on its encoding settings. Enabling this option can save
+a lot of bandwidth at the expense of quality.
+
@end table
ETEXI
DEFHEADING()
-#ifdef TARGET_I386
DEFHEADING(i386 target only:)
-#endif
STEXI
@table @option
ETEXI
-#ifdef TARGET_I386
DEF("win2k-hack", 0, QEMU_OPTION_win2k_hack,
- "-win2k-hack use it when installing Windows 2000 to avoid a disk full bug\n")
-#endif
+ "-win2k-hack use it when installing Windows 2000 to avoid a disk full bug\n",
+ QEMU_ARCH_I386)
STEXI
@item -win2k-hack
+@findex -win2k-hack
Use it when installing Windows 2000 to avoid a disk full bug. After
Windows 2000 is installed, you no longer need this option (this option
slows down the IDE transfers).
ETEXI
-#ifdef TARGET_I386
-DEF("rtc-td-hack", 0, QEMU_OPTION_rtc_td_hack,
- "-rtc-td-hack use it to fix time drift in Windows ACPI HAL\n")
-#endif
-STEXI
-@item -rtc-td-hack
-Use it if you experience time drift problem in Windows with ACPI HAL.
-This option will try to figure out how many timer interrupts were not
-processed by the Windows guest and will re-inject them.
-ETEXI
+HXCOMM Deprecated by -rtc
+DEF("rtc-td-hack", 0, QEMU_OPTION_rtc_td_hack, "", QEMU_ARCH_I386)
-#ifdef TARGET_I386
DEF("no-fd-bootchk", 0, QEMU_OPTION_no_fd_bootchk,
- "-no-fd-bootchk disable boot signature checking for floppy disks\n")
-#endif
+ "-no-fd-bootchk disable boot signature checking for floppy disks\n",
+ QEMU_ARCH_I386)
STEXI
@item -no-fd-bootchk
+@findex -no-fd-bootchk
Disable boot signature checking for floppy disks in Bochs BIOS. It may
be needed to boot from old floppy disks.
+TODO: check reference to Bochs BIOS.
ETEXI
-#ifdef TARGET_I386
DEF("no-acpi", 0, QEMU_OPTION_no_acpi,
- "-no-acpi disable ACPI\n")
-#endif
+ "-no-acpi disable ACPI\n", QEMU_ARCH_I386)
STEXI
@item -no-acpi
+@findex -no-acpi
Disable ACPI (Advanced Configuration and Power Interface) support. Use
it if your guest OS complains about ACPI problems (PC target machine
only).
ETEXI
-#ifdef TARGET_I386
DEF("no-hpet", 0, QEMU_OPTION_no_hpet,
- "-no-hpet disable HPET\n")
-#endif
+ "-no-hpet disable HPET\n", QEMU_ARCH_I386)
STEXI
@item -no-hpet
+@findex -no-hpet
Disable HPET support.
ETEXI
-#ifdef TARGET_I386
-DEF("no-virtio-balloon", 0, QEMU_OPTION_no_virtio_balloon,
- "-no-virtio-balloon disable virtio balloon device\n")
-#endif
+DEF("balloon", HAS_ARG, QEMU_OPTION_balloon,
+ "-balloon none disable balloon device\n"
+ "-balloon virtio[,addr=str]\n"
+ " enable virtio balloon device (default)\n", QEMU_ARCH_ALL)
STEXI
-@item -no-virtio-balloon
-Disable virtio-balloon device.
+@item -balloon none
+@findex -balloon
+Disable balloon device.
+@item -balloon virtio[,addr=@var{addr}]
+Enable virtio balloon device (default), optionally with PCI address
+@var{addr}.
ETEXI
-#ifdef TARGET_I386
DEF("acpitable", HAS_ARG, QEMU_OPTION_acpitable,
"-acpitable [sig=str][,rev=n][,oem_id=str][,oem_table_id=str][,oem_rev=n][,asl_compiler_id=str][,asl_compiler_rev=n][,data=file1[:file2]...]\n"
- " ACPI table description\n")
-#endif
+ " ACPI table description\n", QEMU_ARCH_I386)
STEXI
@item -acpitable [sig=@var{str}][,rev=@var{n}][,oem_id=@var{str}][,oem_table_id=@var{str}][,oem_rev=@var{n}] [,asl_compiler_id=@var{str}][,asl_compiler_rev=@var{n}][,data=@var{file1}[:@var{file2}]...]
+@findex -acpitable
Add ACPI table with specified header fields and context from specified files.
ETEXI
-#ifdef TARGET_I386
DEF("smbios", HAS_ARG, QEMU_OPTION_smbios,
"-smbios file=binary\n"
- " Load SMBIOS entry from binary file\n"
- "-smbios type=0[,vendor=str][,version=str][,date=str][,release=%%d.%%d]\n"
- " Specify SMBIOS type 0 fields\n"
+ " load SMBIOS entry from binary file\n"
+ "-smbios type=0[,vendor=str][,version=str][,date=str][,release=%d.%d]\n"
+ " specify SMBIOS type 0 fields\n"
"-smbios type=1[,manufacturer=str][,product=str][,version=str][,serial=str]\n"
" [,uuid=uuid][,sku=str][,family=str]\n"
- " Specify SMBIOS type 1 fields\n")
-#endif
+ " specify SMBIOS type 1 fields\n", QEMU_ARCH_I386)
STEXI
@item -smbios file=@var{binary}
+@findex -smbios
Load SMBIOS entry from binary file.
@item -smbios type=0[,vendor=@var{str}][,version=@var{str}][,date=@var{str}][,release=@var{%d.%d}]
+@findex -smbios
Specify SMBIOS type 0 fields
-@item -smbios type=1[,manufacturer=@var{str}][,product=@var{str}][,version=@var{str}][,serial=@var{str}][,uuid=@var{uuid}][,sku=@var{str}][,family=@var{str}]
+@item -smbios type=1[,manufacturer=@var{str}][,product=@var{str}] [,version=@var{str}][,serial=@var{str}][,uuid=@var{uuid}][,sku=@var{str}] [,family=@var{str}]
Specify SMBIOS type 1 fields
ETEXI
-#ifdef TARGET_I386
DEFHEADING()
-#endif
STEXI
@end table
ETEXI
@table @option
ETEXI
+HXCOMM Legacy slirp options (now moved to -net user):
+#ifdef CONFIG_SLIRP
+DEF("tftp", HAS_ARG, QEMU_OPTION_tftp, "", QEMU_ARCH_ALL)
+DEF("bootp", HAS_ARG, QEMU_OPTION_bootp, "", QEMU_ARCH_ALL)
+DEF("redir", HAS_ARG, QEMU_OPTION_redir, "", QEMU_ARCH_ALL)
+#ifndef _WIN32
+DEF("smb", HAS_ARG, QEMU_OPTION_smb, "", QEMU_ARCH_ALL)
+#endif
+#endif
+
DEF("net", HAS_ARG, QEMU_OPTION_net,
"-net nic[,vlan=n][,macaddr=mac][,model=type][,name=str][,addr=str][,vectors=v]\n"
" create a new Network Interface Card and connect it to VLAN 'n'\n"
#ifdef CONFIG_SLIRP
- "-net user[,vlan=n][,name=str][,hostname=host]\n"
- " connect the user mode network stack to VLAN 'n' and send\n"
- " hostname 'host' to DHCP clients\n"
+ "-net user[,vlan=n][,name=str][,net=addr[/mask]][,host=addr][,restrict=y|n]\n"
+ " [,hostname=host][,dhcpstart=addr][,dns=addr][,tftp=dir][,bootfile=f]\n"
+ " [,hostfwd=rule][,guestfwd=rule]"
+#ifndef _WIN32
+ "[,smb=dir[,smbserver=addr]]\n"
+#endif
+ " connect the user mode network stack to VLAN 'n', configure its\n"
+ " DHCP server and enabled optional services\n"
#endif
#ifdef _WIN32
"-net tap[,vlan=n][,name=str],ifname=name\n"
" connect the host TAP network interface to VLAN 'n'\n"
#else
- "-net tap[,vlan=n][,name=str][,fd=h][,ifname=name][,script=file][,downscript=dfile]"
-#ifdef TUNSETSNDBUF
- "[,sndbuf=nbytes]"
-#endif
- "\n"
+ "-net tap[,vlan=n][,name=str][,fd=h][,ifname=name][,script=file][,downscript=dfile][,sndbuf=nbytes][,vnet_hdr=on|off][,vhost=on|off][,vhostfd=h]\n"
" connect the host TAP network interface to VLAN 'n' and use the\n"
- " network scripts 'file' (default=%s)\n"
- " and 'dfile' (default=%s);\n"
- " use '[down]script=no' to disable script execution;\n"
+ " network scripts 'file' (default=" DEFAULT_NETWORK_SCRIPT ")\n"
+ " and 'dfile' (default=" DEFAULT_NETWORK_DOWN_SCRIPT ")\n"
+ " use '[down]script=no' to disable script execution\n"
" use 'fd=h' to connect to an already opened TAP interface\n"
-#ifdef TUNSETSNDBUF
- " use 'sndbuf=nbytes' to limit the size of the send buffer\n"
-#endif
+ " use 'sndbuf=nbytes' to limit the size of the send buffer (the\n"
+ " default of 'sndbuf=1048576' can be disabled using 'sndbuf=0')\n"
+ " use vnet_hdr=off to avoid enabling the IFF_VNET_HDR tap flag\n"
+ " use vnet_hdr=on to make the lack of IFF_VNET_HDR support an error condition\n"
+ " use vhost=on to enable experimental in kernel accelerator\n"
+ " use 'vhostfd=h' to connect to an already opened vhost net device\n"
#endif
"-net socket[,vlan=n][,name=str][,fd=h][,listen=[host]:port][,connect=host:port]\n"
" connect the vlan 'n' to another VLAN using a socket connection\n"
#endif
"-net dump[,vlan=n][,file=f][,len=n]\n"
" dump traffic on vlan 'n' to file 'f' (max n bytes per packet)\n"
- "-net none use it alone to have zero network devices; if no -net option\n"
- " is provided, the default is '-net nic -net user'\n")
+ "-net none use it alone to have zero network devices. If no -net option\n"
+ " is provided, the default is '-net nic -net user'\n", QEMU_ARCH_ALL)
+DEF("netdev", HAS_ARG, QEMU_OPTION_netdev,
+ "-netdev ["
+#ifdef CONFIG_SLIRP
+ "user|"
+#endif
+ "tap|"
+#ifdef CONFIG_VDE
+ "vde|"
+#endif
+ "socket],id=str[,option][,option][,...]\n", QEMU_ARCH_ALL)
STEXI
-@item -net nic[,vlan=@var{n}][,macaddr=@var{mac}][,model=@var{type}][,name=@var{name}][,addr=@var{addr}][,vectors=@var{v}]
+@item -net nic[,vlan=@var{n}][,macaddr=@var{mac}][,model=@var{type}] [,name=@var{name}][,addr=@var{addr}][,vectors=@var{v}]
+@findex -net
Create a new Network Interface Card and connect it to VLAN @var{n} (@var{n}
-= 0 is the default). The NIC is an ne2k_pci by default on the PC
+= 0 is the default). The NIC is an e1000 by default on the PC
target. Optionally, the MAC address can be changed to @var{mac}, the
device address set to @var{addr} (PCI cards only),
and a @var{name} can be assigned for use in monitor commands.
Not all devices are supported on all targets. Use -net nic,model=?
for a list of available devices for your target.
-@item -net user[,vlan=@var{n}][,hostname=@var{name}][,name=@var{name}]
+@item -net user[,@var{option}][,@var{option}][,...]
Use the user mode network stack which requires no administrator
-privilege to run. @option{hostname=name} can be used to specify the client
-hostname reported by the builtin DHCP server.
+privilege to run. Valid options are:
+
+@table @option
+@item vlan=@var{n}
+Connect user mode stack to VLAN @var{n} (@var{n} = 0 is the default).
+
+@item name=@var{name}
+Assign symbolic name for use in monitor commands.
+
+@item net=@var{addr}[/@var{mask}]
+Set IP network address the guest will see. Optionally specify the netmask,
+either in the form a.b.c.d or as number of valid top-most bits. Default is
+10.0.2.0/8.
+
+@item host=@var{addr}
+Specify the guest-visible address of the host. Default is the 2nd IP in the
+guest network, i.e. x.x.x.2.
+
+@item restrict=y|yes|n|no
+If this options is enabled, the guest will be isolated, i.e. it will not be
+able to contact the host and no guest IP packets will be routed over the host
+to the outside. This option does not affect explicitly set forwarding rule.
+
+@item hostname=@var{name}
+Specifies the client hostname reported by the builtin DHCP server.
+
+@item dhcpstart=@var{addr}
+Specify the first of the 16 IPs the built-in DHCP server can assign. Default
+is the 16th to 31st IP in the guest network, i.e. x.x.x.16 to x.x.x.31.
+
+@item dns=@var{addr}
+Specify the guest-visible address of the virtual nameserver. The address must
+be different from the host address. Default is the 3rd IP in the guest network,
+i.e. x.x.x.3.
+
+@item tftp=@var{dir}
+When using the user mode network stack, activate a built-in TFTP
+server. The files in @var{dir} will be exposed as the root of a TFTP server.
+The TFTP client on the guest must be configured in binary mode (use the command
+@code{bin} of the Unix TFTP client).
+
+@item bootfile=@var{file}
+When using the user mode network stack, broadcast @var{file} as the BOOTP
+filename. In conjunction with @option{tftp}, this can be used to network boot
+a guest from a local directory.
+
+Example (using pxelinux):
+@example
+qemu -hda linux.img -boot n -net user,tftp=/path/to/tftp/files,bootfile=/pxelinux.0
+@end example
+
+@item smb=@var{dir}[,smbserver=@var{addr}]
+When using the user mode network stack, activate a built-in SMB
+server so that Windows OSes can access to the host files in @file{@var{dir}}
+transparently. The IP address of the SMB server can be set to @var{addr}. By
+default the 4th IP in the guest network is used, i.e. x.x.x.4.
-@item -net channel,@var{port}:@var{dev}
-Forward @option{user} TCP connection to port @var{port} to character device @var{dev}
+In the guest Windows OS, the line:
+@example
+10.0.2.4 smbserver
+@end example
+must be added in the file @file{C:\WINDOWS\LMHOSTS} (for windows 9x/Me)
+or @file{C:\WINNT\SYSTEM32\DRIVERS\ETC\LMHOSTS} (Windows NT/2000).
-@item -net tap[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}][,ifname=@var{name}][,script=@var{file}][,downscript=@var{dfile}]
+Then @file{@var{dir}} can be accessed in @file{\\smbserver\qemu}.
+
+Note that a SAMBA server must be installed on the host OS in
+@file{/usr/sbin/smbd}. QEMU was tested successfully with smbd versions from
+Red Hat 9, Fedora Core 3 and OpenSUSE 11.x.
+
+@item hostfwd=[tcp|udp]:[@var{hostaddr}]:@var{hostport}-[@var{guestaddr}]:@var{guestport}
+Redirect incoming TCP or UDP connections to the host port @var{hostport} to
+the guest IP address @var{guestaddr} on guest port @var{guestport}. If
+@var{guestaddr} is not specified, its value is x.x.x.15 (default first address
+given by the built-in DHCP server). By specifying @var{hostaddr}, the rule can
+be bound to a specific host interface. If no connection type is set, TCP is
+used. This option can be given multiple times.
+
+For example, to redirect host X11 connection from screen 1 to guest
+screen 0, use the following:
+
+@example
+# on the host
+qemu -net user,hostfwd=tcp:127.0.0.1:6001-:6000 [...]
+# this host xterm should open in the guest X11 server
+xterm -display :1
+@end example
+
+To redirect telnet connections from host port 5555 to telnet port on
+the guest, use the following:
+
+@example
+# on the host
+qemu -net user,hostfwd=tcp::5555-:23 [...]
+telnet localhost 5555
+@end example
+
+Then when you use on the host @code{telnet localhost 5555}, you
+connect to the guest telnet server.
+
+@item guestfwd=[tcp]:@var{server}:@var{port}-@var{dev}
+Forward guest TCP connections to the IP address @var{server} on port @var{port}
+to the character device @var{dev}. This option can be given multiple times.
+
+@end table
+
+Note: Legacy stand-alone options -tftp, -bootp, -smb and -redir are still
+processed and applied to -net user. Mixing them with the new configuration
+syntax gives undefined results. Their use for new applications is discouraged
+as they will be removed from future versions.
+
+@item -net tap[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}][,ifname=@var{name}] [,script=@var{file}][,downscript=@var{dfile}]
Connect the host TAP network interface @var{name} to VLAN @var{n}, use
the network script @var{file} to configure it and the network script
@var{dfile} to deconfigure it. If @var{name} is not provided, the OS
-net nic,vlan=1 -net tap,vlan=1,ifname=tap1
@end example
-@item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}][,listen=[@var{host}]:@var{port}][,connect=@var{host}:@var{port}]
+@item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}] [,listen=[@var{host}]:@var{port}][,connect=@var{host}:@var{port}]
Connect the VLAN @var{n} to a remote VLAN in another QEMU virtual
machine using a TCP socket connection. If @option{listen} is
-net socket,connect=127.0.0.1:1234
@end example
-@item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}][,mcast=@var{maddr}:@var{port}]
+@item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}] [,mcast=@var{maddr}:@var{port}]
Create a VLAN @var{n} shared with another QEMU virtual
machines using a UDP multicast socket, effectively making a bus for
/path/to/linux ubd0=/path/to/root_fs eth0=mcast
@end example
-@item -net vde[,vlan=@var{n}][,name=@var{name}][,sock=@var{socketpath}][,port=@var{n}][,group=@var{groupname}][,mode=@var{octalmode}]
+@item -net vde[,vlan=@var{n}][,name=@var{name}][,sock=@var{socketpath}] [,port=@var{n}][,group=@var{groupname}][,mode=@var{octalmode}]
Connect VLAN @var{n} to PORT @var{n} of a vde switch running on host and
listening for incoming connections on @var{socketpath}. Use GROUP @var{groupname}
and MODE @var{octalmode} to change default ownership and permissions for
Indicate that no network devices should be configured. It is used to
override the default configuration (@option{-net nic -net user}) which
is activated if no @option{-net} options are provided.
-ETEXI
-#ifdef CONFIG_SLIRP
-DEF("tftp", HAS_ARG, QEMU_OPTION_tftp, \
- "-tftp dir allow tftp access to files in dir [-net user]\n")
-#endif
-STEXI
-@item -tftp @var{dir}
-When using the user mode network stack, activate a built-in TFTP
-server. The files in @var{dir} will be exposed as the root of a TFTP server.
-The TFTP client on the guest must be configured in binary mode (use the command
-@code{bin} of the Unix TFTP client). The host IP address on the guest is as
-usual 10.0.2.2.
+@end table
ETEXI
-#ifdef CONFIG_SLIRP
-DEF("bootp", HAS_ARG, QEMU_OPTION_bootp, \
- "-bootp file advertise file in BOOTP replies\n")
+DEFHEADING()
+
+DEFHEADING(Character device options:)
+
+DEF("chardev", HAS_ARG, QEMU_OPTION_chardev,
+ "-chardev null,id=id[,mux=on|off]\n"
+ "-chardev socket,id=id[,host=host],port=host[,to=to][,ipv4][,ipv6][,nodelay]\n"
+ " [,server][,nowait][,telnet][,mux=on|off] (tcp)\n"
+ "-chardev socket,id=id,path=path[,server][,nowait][,telnet],[mux=on|off] (unix)\n"
+ "-chardev udp,id=id[,host=host],port=port[,localaddr=localaddr]\n"
+ " [,localport=localport][,ipv4][,ipv6][,mux=on|off]\n"
+ "-chardev msmouse,id=id[,mux=on|off]\n"
+ "-chardev vc,id=id[[,width=width][,height=height]][[,cols=cols][,rows=rows]]\n"
+ " [,mux=on|off]\n"
+ "-chardev file,id=id,path=path[,mux=on|off]\n"
+ "-chardev pipe,id=id,path=path[,mux=on|off]\n"
+#ifdef _WIN32
+ "-chardev console,id=id[,mux=on|off]\n"
+ "-chardev serial,id=id,path=path[,mux=on|off]\n"
+#else
+ "-chardev pty,id=id[,mux=on|off]\n"
+ "-chardev stdio,id=id[,mux=on|off][,signal=on|off]\n"
+#endif
+#ifdef CONFIG_BRLAPI
+ "-chardev braille,id=id[,mux=on|off]\n"
+#endif
+#if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
+ || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
+ "-chardev tty,id=id,path=path[,mux=on|off]\n"
+#endif
+#if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__)
+ "-chardev parport,id=id,path=path[,mux=on|off]\n"
#endif
+ , QEMU_ARCH_ALL
+)
+
STEXI
-@item -bootp @var{file}
-When using the user mode network stack, broadcast @var{file} as the BOOTP
-filename. In conjunction with @option{-tftp}, this can be used to network boot
-a guest from a local directory.
-Example (using pxelinux):
-@example
-qemu -hda linux.img -boot n -tftp /path/to/tftp/files -bootp /pxelinux.0
-@end example
-ETEXI
+The general form of a character device option is:
+@table @option
-#ifndef _WIN32
-DEF("smb", HAS_ARG, QEMU_OPTION_smb, \
- "-smb dir allow SMB access to files in 'dir' [-net user]\n")
-#endif
-STEXI
-@item -smb @var{dir}
-When using the user mode network stack, activate a built-in SMB
-server so that Windows OSes can access to the host files in @file{@var{dir}}
-transparently.
+@item -chardev @var{backend} ,id=@var{id} [,mux=on|off] [,@var{options}]
+@findex -chardev
+Backend is one of:
+@option{null},
+@option{socket},
+@option{udp},
+@option{msmouse},
+@option{vc},
+@option{file},
+@option{pipe},
+@option{console},
+@option{serial},
+@option{pty},
+@option{stdio},
+@option{braille},
+@option{tty},
+@option{parport}.
+The specific backend will determine the applicable options.
-In the guest Windows OS, the line:
-@example
-10.0.2.4 smbserver
-@end example
-must be added in the file @file{C:\WINDOWS\LMHOSTS} (for windows 9x/Me)
-or @file{C:\WINNT\SYSTEM32\DRIVERS\ETC\LMHOSTS} (Windows NT/2000).
+All devices must have an id, which can be any string up to 127 characters long.
+It is used to uniquely identify this device in other command line directives.
-Then @file{@var{dir}} can be accessed in @file{\\smbserver\qemu}.
+A character device may be used in multiplexing mode by multiple front-ends.
+The key sequence of @key{Control-a} and @key{c} will rotate the input focus
+between attached front-ends. Specify @option{mux=on} to enable this mode.
-Note that a SAMBA server must be installed on the host OS in
-@file{/usr/sbin/smbd}. QEMU was tested successfully with smbd version
-2.2.7a from the Red Hat 9 and version 3.0.10-1.fc3 from Fedora Core 3.
-ETEXI
+Options to each backend are described below.
-#ifdef CONFIG_SLIRP
-DEF("redir", HAS_ARG, QEMU_OPTION_redir, \
- "-redir [tcp|udp]:host-port:[guest-host]:guest-port\n" \
- " redirect TCP or UDP connections from host to guest [-net user]\n")
-#endif
-STEXI
-@item -redir [tcp|udp]:@var{host-port}:[@var{guest-host}]:@var{guest-port}
+@item -chardev null ,id=@var{id}
+A void device. This device will not emit any data, and will drop any data it
+receives. The null backend does not take any options.
-When using the user mode network stack, redirect incoming TCP or UDP
-connections to the host port @var{host-port} to the guest
-@var{guest-host} on guest port @var{guest-port}. If @var{guest-host}
-is not specified, its value is 10.0.2.15 (default address given by the
-built-in DHCP server). If no connection type is specified, TCP is used.
+@item -chardev socket ,id=@var{id} [@var{TCP options} or @var{unix options}] [,server] [,nowait] [,telnet]
-For example, to redirect host X11 connection from screen 1 to guest
-screen 0, use the following:
+Create a two-way stream socket, which can be either a TCP or a unix socket. A
+unix socket will be created if @option{path} is specified. Behaviour is
+undefined if TCP options are specified for a unix socket.
-@example
-# on the host
-qemu -redir tcp:6001::6000 [...]
-# this host xterm should open in the guest X11 server
-xterm -display :1
-@end example
+@option{server} specifies that the socket shall be a listening socket.
-To redirect telnet connections from host port 5555 to telnet port on
-the guest, use the following:
+@option{nowait} specifies that QEMU should not block waiting for a client to
+connect to a listening socket.
-@example
-# on the host
-qemu -redir tcp:5555::23 [...]
-telnet localhost 5555
-@end example
+@option{telnet} specifies that traffic on the socket should interpret telnet
+escape sequences.
-Then when you use on the host @code{telnet localhost 5555}, you
-connect to the guest telnet server.
+TCP and unix socket options are given below:
+
+@table @option
+
+@item TCP options: port=@var{port} [,host=@var{host}] [,to=@var{to}] [,ipv4] [,ipv6] [,nodelay]
+
+@option{host} for a listening socket specifies the local address to be bound.
+For a connecting socket species the remote host to connect to. @option{host} is
+optional for listening sockets. If not specified it defaults to @code{0.0.0.0}.
+
+@option{port} for a listening socket specifies the local port to be bound. For a
+connecting socket specifies the port on the remote host to connect to.
+@option{port} can be given as either a port number or a service name.
+@option{port} is required.
+
+@option{to} is only relevant to listening sockets. If it is specified, and
+@option{port} cannot be bound, QEMU will attempt to bind to subsequent ports up
+to and including @option{to} until it succeeds. @option{to} must be specified
+as a port number.
+
+@option{ipv4} and @option{ipv6} specify that either IPv4 or IPv6 must be used.
+If neither is specified the socket may use either protocol.
+
+@option{nodelay} disables the Nagle algorithm.
+
+@item unix options: path=@var{path}
+
+@option{path} specifies the local path of the unix socket. @option{path} is
+required.
+
+@end table
+
+@item -chardev udp ,id=@var{id} [,host=@var{host}] ,port=@var{port} [,localaddr=@var{localaddr}] [,localport=@var{localport}] [,ipv4] [,ipv6]
+
+Sends all traffic from the guest to a remote host over UDP.
+
+@option{host} specifies the remote host to connect to. If not specified it
+defaults to @code{localhost}.
+
+@option{port} specifies the port on the remote host to connect to. @option{port}
+is required.
+
+@option{localaddr} specifies the local address to bind to. If not specified it
+defaults to @code{0.0.0.0}.
+
+@option{localport} specifies the local port to bind to. If not specified any
+available local port will be used.
+
+@option{ipv4} and @option{ipv6} specify that either IPv4 or IPv6 must be used.
+If neither is specified the device may use either protocol.
+
+@item -chardev msmouse ,id=@var{id}
+
+Forward QEMU's emulated msmouse events to the guest. @option{msmouse} does not
+take any options.
+
+@item -chardev vc ,id=@var{id} [[,width=@var{width}] [,height=@var{height}]] [[,cols=@var{cols}] [,rows=@var{rows}]]
+
+Connect to a QEMU text console. @option{vc} may optionally be given a specific
+size.
+
+@option{width} and @option{height} specify the width and height respectively of
+the console, in pixels.
+
+@option{cols} and @option{rows} specify that the console be sized to fit a text
+console with the given dimensions.
+
+@item -chardev file ,id=@var{id} ,path=@var{path}
+
+Log all traffic received from the guest to a file.
+
+@option{path} specifies the path of the file to be opened. This file will be
+created if it does not already exist, and overwritten if it does. @option{path}
+is required.
+
+@item -chardev pipe ,id=@var{id} ,path=@var{path}
+
+Create a two-way connection to the guest. The behaviour differs slightly between
+Windows hosts and other hosts:
+
+On Windows, a single duplex pipe will be created at
+@file{\\.pipe\@option{path}}.
+
+On other hosts, 2 pipes will be created called @file{@option{path}.in} and
+@file{@option{path}.out}. Data written to @file{@option{path}.in} will be
+received by the guest. Data written by the guest can be read from
+@file{@option{path}.out}. QEMU will not create these fifos, and requires them to
+be present.
+
+@option{path} forms part of the pipe path as described above. @option{path} is
+required.
+
+@item -chardev console ,id=@var{id}
+
+Send traffic from the guest to QEMU's standard output. @option{console} does not
+take any options.
+
+@option{console} is only available on Windows hosts.
+
+@item -chardev serial ,id=@var{id} ,path=@option{path}
+
+Send traffic from the guest to a serial device on the host.
+
+@option{serial} is
+only available on Windows hosts.
+
+@option{path} specifies the name of the serial device to open.
+
+@item -chardev pty ,id=@var{id}
+
+Create a new pseudo-terminal on the host and connect to it. @option{pty} does
+not take any options.
+
+@option{pty} is not available on Windows hosts.
+
+@item -chardev stdio ,id=@var{id} [,signal=on|off]
+Connect to standard input and standard output of the qemu process.
+
+@option{signal} controls if signals are enabled on the terminal, that includes
+exiting QEMU with the key sequence @key{Control-c}. This option is enabled by
+default, use @option{signal=off} to disable it.
+
+@option{stdio} is not available on Windows hosts.
+
+@item -chardev braille ,id=@var{id}
+
+Connect to a local BrlAPI server. @option{braille} does not take any options.
+
+@item -chardev tty ,id=@var{id} ,path=@var{path}
+
+Connect to a local tty device.
+
+@option{tty} is only available on Linux, Sun, FreeBSD, NetBSD, OpenBSD and
+DragonFlyBSD hosts.
+
+@option{path} specifies the path to the tty. @option{path} is required.
+
+@item -chardev parport ,id=@var{id} ,path=@var{path}
+
+@option{parport} is only available on Linux, FreeBSD and DragonFlyBSD hosts.
+
+Connect to a local parallel port.
+
+@option{path} specifies the path to the parallel port device. @option{path} is
+required.
@end table
ETEXI
+DEFHEADING()
+
+DEFHEADING(Bluetooth(R) options:)
+
DEF("bt", HAS_ARG, QEMU_OPTION_bt, \
- "\n" \
"-bt hci,null dumb bluetooth HCI - doesn't respond to commands\n" \
"-bt hci,host[:id]\n" \
" use host's HCI with the given name\n" \
"-bt vhci[,vlan=n]\n" \
" add host computer to virtual scatternet 'n' using VHCI\n" \
"-bt device:dev[,vlan=n]\n" \
- " emulate a bluetooth device 'dev' in scatternet 'n'\n")
+ " emulate a bluetooth device 'dev' in scatternet 'n'\n",
+ QEMU_ARCH_ALL)
STEXI
-Bluetooth(R) options:
@table @option
@item -bt hci[...]
+@findex -bt
Defines the function of the corresponding Bluetooth HCI. -bt options
are matched with the HCIs present in the chosen machine type. For
example when emulating a machine with only one HCI built into it, only
@anchor{bt-hcis}
The following three types are recognized:
-@table @code
+@table @option
@item -bt hci,null
(default) The corresponding Bluetooth HCI assumes no internal logic
and will not respond to any HCI commands or emit events.
(default @code{0}). QEMU can only emulate one type of bluetooth devices
currently:
-@table @code
+@table @option
@item keyboard
Virtual wireless keyboard implementing the HIDP bluetooth profile.
@end table
DEFHEADING()
-DEFHEADING(Linux boot specific:)
+DEFHEADING(Linux/Multiboot boot specific:)
STEXI
-When using these options, you can use a given
-Linux kernel without installing it in the disk image. It can be useful
+
+When using these options, you can use a given Linux or Multiboot
+kernel without installing it in the disk image. It can be useful
for easier testing of various kernels.
@table @option
ETEXI
DEF("kernel", HAS_ARG, QEMU_OPTION_kernel, \
- "-kernel bzImage use 'bzImage' as kernel image\n")
+ "-kernel bzImage use 'bzImage' as kernel image\n", QEMU_ARCH_ALL)
STEXI
@item -kernel @var{bzImage}
-Use @var{bzImage} as kernel image.
+@findex -kernel
+Use @var{bzImage} as kernel image. The kernel can be either a Linux kernel
+or in multiboot format.
ETEXI
DEF("append", HAS_ARG, QEMU_OPTION_append, \
- "-append cmdline use 'cmdline' as kernel command line\n")
+ "-append cmdline use 'cmdline' as kernel command line\n", QEMU_ARCH_ALL)
STEXI
@item -append @var{cmdline}
+@findex -append
Use @var{cmdline} as kernel command line
ETEXI
DEF("initrd", HAS_ARG, QEMU_OPTION_initrd, \
- "-initrd file use 'file' as initial ram disk\n")
+ "-initrd file use 'file' as initial ram disk\n", QEMU_ARCH_ALL)
STEXI
@item -initrd @var{file}
+@findex -initrd
Use @var{file} as initial ram disk.
+
+@item -initrd "@var{file1} arg=foo,@var{file2}"
+
+This syntax is only available with multiboot.
+
+Use @var{file1} and @var{file2} as modules and pass arg=foo as parameter to the
+first module.
ETEXI
STEXI
ETEXI
DEF("serial", HAS_ARG, QEMU_OPTION_serial, \
- "-serial dev redirect the serial port to char device 'dev'\n")
+ "-serial dev redirect the serial port to char device 'dev'\n",
+ QEMU_ARCH_ALL)
STEXI
@item -serial @var{dev}
+@findex -serial
Redirect the virtual serial port to host character device
@var{dev}. The default device is @code{vc} in graphical mode and
@code{stdio} in non graphical mode.
Use @code{-serial none} to disable all serial ports.
Available character devices are:
-@table @code
-@item vc[:WxH]
+@table @option
+@item vc[:@var{W}x@var{H}]
Virtual console. Optionally, a width and height can be given in pixel with
@example
vc:800x600
When @var{remote_host} or @var{src_ip} are not specified
they default to @code{0.0.0.0}.
When not using a specified @var{src_port} a random port is automatically chosen.
-@item msmouse
-Three button serial mouse. Configure the guest to use Microsoft protocol.
If you just want a simple readonly console you can use @code{netcat} or
@code{nc}, by starting qemu with: @code{-serial udp::4555} and nc as:
Braille device. This will use BrlAPI to display the braille output on a real
or fake device.
+@item msmouse
+Three button serial mouse. Configure the guest to use Microsoft protocol.
@end table
ETEXI
DEF("parallel", HAS_ARG, QEMU_OPTION_parallel, \
- "-parallel dev redirect the parallel port to char device 'dev'\n")
+ "-parallel dev redirect the parallel port to char device 'dev'\n",
+ QEMU_ARCH_ALL)
STEXI
@item -parallel @var{dev}
+@findex -parallel
Redirect the virtual parallel port to host device @var{dev} (same
devices as the serial port). On Linux hosts, @file{/dev/parportN} can
be used to use hardware devices connected on the corresponding host
ETEXI
DEF("monitor", HAS_ARG, QEMU_OPTION_monitor, \
- "-monitor dev redirect the monitor to char device 'dev'\n")
+ "-monitor dev redirect the monitor to char device 'dev'\n",
+ QEMU_ARCH_ALL)
STEXI
@item -monitor @var{dev}
+@findex -monitor
Redirect the monitor to host device @var{dev} (same devices as the
serial port).
The default device is @code{vc} in graphical mode and @code{stdio} in
non graphical mode.
ETEXI
+DEF("qmp", HAS_ARG, QEMU_OPTION_qmp, \
+ "-qmp dev like -monitor but opens in 'control' mode\n",
+ QEMU_ARCH_ALL)
+STEXI
+@item -qmp @var{dev}
+@findex -qmp
+Like -monitor but opens in 'control' mode.
+ETEXI
+
+DEF("mon", HAS_ARG, QEMU_OPTION_mon, \
+ "-mon chardev=[name][,mode=readline|control][,default]\n", QEMU_ARCH_ALL)
+STEXI
+@item -mon chardev=[name][,mode=readline|control][,default]
+@findex -mon
+Setup monitor on chardev @var{name}.
+ETEXI
+
+DEF("debugcon", HAS_ARG, QEMU_OPTION_debugcon, \
+ "-debugcon dev redirect the debug console to char device 'dev'\n",
+ QEMU_ARCH_ALL)
+STEXI
+@item -debugcon @var{dev}
+@findex -debugcon
+Redirect the debug console to host device @var{dev} (same devices as the
+serial port). The debug console is an I/O port which is typically port
+0xe9; writing to that I/O port sends output to this device.
+The default device is @code{vc} in graphical mode and @code{stdio} in
+non graphical mode.
+ETEXI
DEF("pidfile", HAS_ARG, QEMU_OPTION_pidfile, \
- "-pidfile file write PID to 'file'\n")
+ "-pidfile file write PID to 'file'\n", QEMU_ARCH_ALL)
STEXI
@item -pidfile @var{file}
+@findex -pidfile
Store the QEMU process PID in @var{file}. It is useful if you launch QEMU
from a script.
ETEXI
DEF("singlestep", 0, QEMU_OPTION_singlestep, \
- "-singlestep always run in singlestep mode\n")
+ "-singlestep always run in singlestep mode\n", QEMU_ARCH_ALL)
STEXI
@item -singlestep
+@findex -singlestep
Run the emulation in single step mode.
ETEXI
DEF("S", 0, QEMU_OPTION_S, \
- "-S freeze CPU at startup (use 'c' to start execution)\n")
+ "-S freeze CPU at startup (use 'c' to start execution)\n",
+ QEMU_ARCH_ALL)
STEXI
@item -S
+@findex -S
Do not start CPU at startup (you must type 'c' in the monitor).
ETEXI
DEF("gdb", HAS_ARG, QEMU_OPTION_gdb, \
- "-gdb dev wait for gdb connection on 'dev'\n")
+ "-gdb dev wait for gdb connection on 'dev'\n", QEMU_ARCH_ALL)
STEXI
@item -gdb @var{dev}
+@findex -gdb
Wait for gdb connection on device @var{dev} (@pxref{gdb_usage}). Typical
connections will likely be TCP-based, but also UDP, pseudo TTY, or even
stdio are reasonable use case. The latter is allowing to start qemu from
ETEXI
DEF("s", 0, QEMU_OPTION_s, \
- "-s shorthand for -gdb tcp::%s\n")
+ "-s shorthand for -gdb tcp::" DEFAULT_GDBSTUB_PORT "\n",
+ QEMU_ARCH_ALL)
STEXI
@item -s
+@findex -s
Shorthand for -gdb tcp::1234, i.e. open a gdbserver on TCP port 1234
(@pxref{gdb_usage}).
ETEXI
DEF("d", HAS_ARG, QEMU_OPTION_d, \
- "-d item1,... output log to %s (use -d ? for a list of log items)\n")
+ "-d item1,... output log to /tmp/qemu.log (use -d ? for a list of log items)\n",
+ QEMU_ARCH_ALL)
STEXI
@item -d
+@findex -d
Output log in /tmp/qemu.log
ETEXI
DEF("hdachs", HAS_ARG, QEMU_OPTION_hdachs, \
"-hdachs c,h,s[,t]\n" \
" force hard disk 0 physical geometry and the optional BIOS\n" \
- " translation (t=none or lba) (usually qemu can guess them)\n")
+ " translation (t=none or lba) (usually qemu can guess them)\n",
+ QEMU_ARCH_ALL)
STEXI
@item -hdachs @var{c},@var{h},@var{s},[,@var{t}]
+@findex -hdachs
Force hard disk 0 physical geometry (1 <= @var{c} <= 16383, 1 <=
@var{h} <= 16, 1 <= @var{s} <= 63) and optionally force the BIOS
translation mode (@var{t}=none, lba or auto). Usually QEMU can guess
ETEXI
DEF("L", HAS_ARG, QEMU_OPTION_L, \
- "-L path set the directory for the BIOS, VGA BIOS and keymaps\n")
+ "-L path set the directory for the BIOS, VGA BIOS and keymaps\n",
+ QEMU_ARCH_ALL)
STEXI
@item -L @var{path}
+@findex -L
Set the directory for the BIOS, VGA BIOS and keymaps.
ETEXI
DEF("bios", HAS_ARG, QEMU_OPTION_bios, \
- "-bios file set the filename for the BIOS\n")
+ "-bios file set the filename for the BIOS\n", QEMU_ARCH_ALL)
STEXI
@item -bios @var{file}
+@findex -bios
Set the filename for the BIOS.
ETEXI
-#ifdef CONFIG_KQEMU
-DEF("kernel-kqemu", 0, QEMU_OPTION_kernel_kqemu, \
- "-kernel-kqemu enable KQEMU full virtualization (default is user mode only)\n")
-#endif
-STEXI
-@item -kernel-kqemu
-Enable KQEMU full virtualization (default is user mode only).
-ETEXI
-
-#ifdef CONFIG_KQEMU
-DEF("no-kqemu", 0, QEMU_OPTION_no_kqemu, \
- "-no-kqemu disable KQEMU kernel module usage\n")
-#endif
-STEXI
-@item -no-kqemu
-Disable KQEMU kernel module usage. KQEMU options are only available if
-KQEMU support is enabled when compiling.
-ETEXI
-
-#ifdef CONFIG_KVM
DEF("enable-kvm", 0, QEMU_OPTION_enable_kvm, \
- "-enable-kvm enable KVM full virtualization support\n")
-#endif
+ "-enable-kvm enable KVM full virtualization support\n", QEMU_ARCH_ALL)
STEXI
@item -enable-kvm
+@findex -enable-kvm
Enable KVM full virtualization support. This option is only available
if KVM support is enabled when compiling.
ETEXI
-#ifdef CONFIG_XEN
DEF("xen-domid", HAS_ARG, QEMU_OPTION_xen_domid,
- "-xen-domid id specify xen guest domain id\n")
+ "-xen-domid id specify xen guest domain id\n", QEMU_ARCH_ALL)
DEF("xen-create", 0, QEMU_OPTION_xen_create,
"-xen-create create domain using xen hypercalls, bypassing xend\n"
- " warning: should not be used when xend is in use\n")
+ " warning: should not be used when xend is in use\n",
+ QEMU_ARCH_ALL)
DEF("xen-attach", 0, QEMU_OPTION_xen_attach,
"-xen-attach attach to existing xen domain\n"
- " xend will use this when starting qemu\n")
-#endif
+ " xend will use this when starting qemu\n",
+ QEMU_ARCH_ALL)
+STEXI
+@item -xen-domid @var{id}
+@findex -xen-domid
+Specify xen guest domain @var{id} (XEN only).
+@item -xen-create
+@findex -xen-create
+Create domain using xen hypercalls, bypassing xend.
+Warning: should not be used when xend is in use (XEN only).
+@item -xen-attach
+@findex -xen-attach
+Attach to existing xen domain.
+xend will use this when starting qemu (XEN only).
+ETEXI
DEF("no-reboot", 0, QEMU_OPTION_no_reboot, \
- "-no-reboot exit instead of rebooting\n")
+ "-no-reboot exit instead of rebooting\n", QEMU_ARCH_ALL)
STEXI
@item -no-reboot
+@findex -no-reboot
Exit instead of rebooting.
ETEXI
DEF("no-shutdown", 0, QEMU_OPTION_no_shutdown, \
- "-no-shutdown stop before shutdown\n")
+ "-no-shutdown stop before shutdown\n", QEMU_ARCH_ALL)
STEXI
@item -no-shutdown
+@findex -no-shutdown
Don't exit QEMU on guest shutdown, but instead only stop the emulation.
This allows for instance switching to monitor to commit changes to the
disk image.
DEF("loadvm", HAS_ARG, QEMU_OPTION_loadvm, \
"-loadvm [tag|id]\n" \
- " start right away with a saved state (loadvm in monitor)\n")
+ " start right away with a saved state (loadvm in monitor)\n",
+ QEMU_ARCH_ALL)
STEXI
@item -loadvm @var{file}
+@findex -loadvm
Start right away with a saved state (@code{loadvm} in monitor)
ETEXI
#ifndef _WIN32
DEF("daemonize", 0, QEMU_OPTION_daemonize, \
- "-daemonize daemonize QEMU after initializing\n")
+ "-daemonize daemonize QEMU after initializing\n", QEMU_ARCH_ALL)
#endif
STEXI
@item -daemonize
+@findex -daemonize
Daemonize the QEMU process after initialization. QEMU will not detach from
standard IO until it is ready to receive connections on any of its devices.
This option is a useful way for external programs to launch QEMU without having
ETEXI
DEF("option-rom", HAS_ARG, QEMU_OPTION_option_rom, \
- "-option-rom rom load a file, rom, into the option ROM space\n")
+ "-option-rom rom load a file, rom, into the option ROM space\n",
+ QEMU_ARCH_ALL)
STEXI
@item -option-rom @var{file}
+@findex -option-rom
Load the contents of @var{file} as an option ROM.
This option is useful to load things like EtherBoot.
ETEXI
DEF("clock", HAS_ARG, QEMU_OPTION_clock, \
"-clock force the use of the given methods for timer alarm.\n" \
- " To see what timers are available use -clock ?\n")
+ " To see what timers are available use -clock ?\n",
+ QEMU_ARCH_ALL)
STEXI
@item -clock @var{method}
+@findex -clock
Force the use of the given methods for timer alarm. To see what timers
are available use -clock ?.
ETEXI
-DEF("localtime", 0, QEMU_OPTION_localtime, \
- "-localtime set the real time clock to local time [default=utc]\n")
-STEXI
-@item -localtime
-Set the real time clock to local time (the default is to UTC
-time). This option is needed to have correct date in MS-DOS or
-Windows.
-ETEXI
+HXCOMM Options deprecated by -rtc
+DEF("localtime", 0, QEMU_OPTION_localtime, "", QEMU_ARCH_ALL)
+DEF("startdate", HAS_ARG, QEMU_OPTION_startdate, "", QEMU_ARCH_ALL)
+
+DEF("rtc", HAS_ARG, QEMU_OPTION_rtc, \
+ "-rtc [base=utc|localtime|date][,clock=host|vm][,driftfix=none|slew]\n" \
+ " set the RTC base and clock, enable drift fix for clock ticks (x86 only)\n",
+ QEMU_ARCH_ALL)
-DEF("startdate", HAS_ARG, QEMU_OPTION_startdate, \
- "-startdate select initial date of the clock\n")
STEXI
-@item -startdate @var{date}
-Set the initial date of the real time clock. Valid formats for
-@var{date} are: @code{now} or @code{2006-06-17T16:01:21} or
-@code{2006-06-17}. The default value is @code{now}.
+@item -rtc [base=utc|localtime|@var{date}][,clock=host|vm][,driftfix=none|slew]
+@findex -rtc
+Specify @option{base} as @code{utc} or @code{localtime} to let the RTC start at the current
+UTC or local time, respectively. @code{localtime} is required for correct date in
+MS-DOS or Windows. To start at a specific point in time, provide @var{date} in the
+format @code{2006-06-17T16:01:21} or @code{2006-06-17}. The default base is UTC.
+
+By default the RTC is driven by the host system time. This allows to use the
+RTC as accurate reference clock inside the guest, specifically if the host
+time is smoothly following an accurate external reference clock, e.g. via NTP.
+If you want to isolate the guest time from the host, even prevent it from
+progressing during suspension, you can set @option{clock} to @code{vm} instead.
+
+Enable @option{driftfix} (i386 targets only) if you experience time drift problems,
+specifically with Windows' ACPI HAL. This option will try to figure out how
+many timer interrupts were not processed by the Windows guest and will
+re-inject them.
ETEXI
DEF("icount", HAS_ARG, QEMU_OPTION_icount, \
"-icount [N|auto]\n" \
" enable virtual instruction counter with 2^N clock ticks per\n" \
- " instruction\n")
+ " instruction\n", QEMU_ARCH_ALL)
STEXI
-@item -icount [N|auto]
+@item -icount [@var{N}|auto]
+@findex -icount
Enable virtual instruction counter. The virtual cpu will execute one
-instruction every 2^N ns of virtual time. If @code{auto} is specified
+instruction every 2^@var{N} ns of virtual time. If @code{auto} is specified
then the virtual cpu speed will be automatically adjusted to keep virtual
time within a few seconds of real time.
DEF("watchdog", HAS_ARG, QEMU_OPTION_watchdog, \
"-watchdog i6300esb|ib700\n" \
- " enable virtual hardware watchdog [default=none]\n")
+ " enable virtual hardware watchdog [default=none]\n",
+ QEMU_ARCH_ALL)
STEXI
@item -watchdog @var{model}
+@findex -watchdog
Create a virtual hardware watchdog device. Once enabled (by a guest
action), the watchdog must be periodically polled by an agent inside
the guest or else the guest will be restarted.
DEF("watchdog-action", HAS_ARG, QEMU_OPTION_watchdog_action, \
"-watchdog-action reset|shutdown|poweroff|pause|debug|none\n" \
- " action when watchdog fires [default=reset]\n")
+ " action when watchdog fires [default=reset]\n",
+ QEMU_ARCH_ALL)
STEXI
@item -watchdog-action @var{action}
ETEXI
DEF("echr", HAS_ARG, QEMU_OPTION_echr, \
- "-echr chr set terminal escape character instead of ctrl-a\n")
+ "-echr chr set terminal escape character instead of ctrl-a\n",
+ QEMU_ARCH_ALL)
STEXI
-@item -echr numeric_ascii_value
+@item -echr @var{numeric_ascii_value}
+@findex -echr
Change the escape character used for switching to the monitor when using
monitor and serial sharing. The default is @code{0x01} when using the
@code{-nographic} option. @code{0x01} is equal to pressing
DEF("virtioconsole", HAS_ARG, QEMU_OPTION_virtiocon, \
"-virtioconsole c\n" \
- " set virtio console\n")
+ " set virtio console\n", QEMU_ARCH_ALL)
STEXI
@item -virtioconsole @var{c}
+@findex -virtioconsole
Set virtio console.
+
+This option is maintained for backward compatibility.
+
+Please use @code{-device virtconsole} for the new way of invocation.
ETEXI
DEF("show-cursor", 0, QEMU_OPTION_show_cursor, \
- "-show-cursor show cursor\n")
+ "-show-cursor show cursor\n", QEMU_ARCH_ALL)
STEXI
+@item -show-cursor
+@findex -show-cursor
+Show cursor.
ETEXI
DEF("tb-size", HAS_ARG, QEMU_OPTION_tb_size, \
- "-tb-size n set TB size\n")
+ "-tb-size n set TB size\n", QEMU_ARCH_ALL)
STEXI
+@item -tb-size @var{n}
+@findex -tb-size
+Set TB size.
ETEXI
DEF("incoming", HAS_ARG, QEMU_OPTION_incoming, \
- "-incoming p prepare for incoming migration, listen on port p\n")
+ "-incoming p prepare for incoming migration, listen on port p\n",
+ QEMU_ARCH_ALL)
STEXI
+@item -incoming @var{port}
+@findex -incoming
+Prepare for incoming migration, listen on @var{port}.
+ETEXI
+
+DEF("nodefaults", 0, QEMU_OPTION_nodefaults, \
+ "-nodefaults don't create default devices\n", QEMU_ARCH_ALL)
+STEXI
+@item -nodefaults
+@findex -nodefaults
+Don't create default devices.
ETEXI
#ifndef _WIN32
DEF("chroot", HAS_ARG, QEMU_OPTION_chroot, \
- "-chroot dir Chroot to dir just before starting the VM.\n")
+ "-chroot dir chroot to dir just before starting the VM\n",
+ QEMU_ARCH_ALL)
#endif
STEXI
-@item -chroot dir
+@item -chroot @var{dir}
+@findex -chroot
Immediately before starting guest execution, chroot to the specified
directory. Especially useful in combination with -runas.
ETEXI
#ifndef _WIN32
DEF("runas", HAS_ARG, QEMU_OPTION_runas, \
- "-runas user Change to user id user just before starting the VM.\n")
+ "-runas user change to user id user just before starting the VM\n",
+ QEMU_ARCH_ALL)
#endif
STEXI
-@item -runas user
+@item -runas @var{user}
+@findex -runas
Immediately before starting guest execution, drop root privileges, switching
to the specified user.
ETEXI
-STEXI
-@end table
-ETEXI
-
-#if defined(TARGET_SPARC) || defined(TARGET_PPC)
DEF("prom-env", HAS_ARG, QEMU_OPTION_prom_env,
"-prom-env variable=value\n"
- " set OpenBIOS nvram variables\n")
-#endif
-#if defined(TARGET_ARM) || defined(TARGET_M68K)
+ " set OpenBIOS nvram variables\n",
+ QEMU_ARCH_PPC | QEMU_ARCH_SPARC)
+STEXI
+@item -prom-env @var{variable}=@var{value}
+@findex -prom-env
+Set OpenBIOS nvram @var{variable} to given @var{value} (PPC, SPARC only).
+ETEXI
DEF("semihosting", 0, QEMU_OPTION_semihosting,
- "-semihosting semihosting mode\n")
-#endif
-#if defined(TARGET_ARM)
+ "-semihosting semihosting mode\n", QEMU_ARCH_ARM | QEMU_ARCH_M68K)
+STEXI
+@item -semihosting
+@findex -semihosting
+Semihosting mode (ARM, M68K only).
+ETEXI
DEF("old-param", 0, QEMU_OPTION_old_param,
- "-old-param old param mode\n")
-#endif
+ "-old-param old param mode\n", QEMU_ARCH_ARM)
+STEXI
+@item -old-param
+@findex -old-param (ARM)
+Old param mode (ARM only).
+ETEXI
+
+DEF("readconfig", HAS_ARG, QEMU_OPTION_readconfig,
+ "-readconfig <file>\n", QEMU_ARCH_ALL)
+STEXI
+@item -readconfig @var{file}
+@findex -readconfig
+Read device configuration from @var{file}.
+ETEXI
+DEF("writeconfig", HAS_ARG, QEMU_OPTION_writeconfig,
+ "-writeconfig <file>\n"
+ " read/write config file\n", QEMU_ARCH_ALL)
+STEXI
+@item -writeconfig @var{file}
+@findex -writeconfig
+Write device configuration to @var{file}.
+ETEXI
+DEF("nodefconfig", 0, QEMU_OPTION_nodefconfig,
+ "-nodefconfig\n"
+ " do not load default config files at startup\n",
+ QEMU_ARCH_ALL)
+STEXI
+@item -nodefconfig
+@findex -nodefconfig
+Normally QEMU loads a configuration file from @var{sysconfdir}/qemu.conf and
+@var{sysconfdir}/target-@var{ARCH}.conf on startup. The @code{-nodefconfig}
+option will prevent QEMU from loading these configuration files at startup.
+ETEXI
+
+HXCOMM This is the last statement. Insert new options before this line!
+STEXI
+@end table
+ETEXI
projects / qemu.git / blobdiff